Name: CVE-2025-53537: Missing Release of Memory after Effective Lifetime
Creator: Rapid7
Published: 2025-07-23T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2025-53537, CVSS 7.5, EPSS 0.00502

LibHTP is a security-aware parser for the HTTP protocol and its related bits and pieces. In versions 0.5.50 and below, there is a traffic-induced memory leak that can starve the process of memory, leading to loss of visibility. To workaround this issue, set `suricata.yaml app-layer.protocols.http.libhtp.default-config.lzma-enabled` to false. This issue is fixed in version 0.5.51.

CVSS Details

CVSS 3.1 Base Score: 7.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade libhtp	Jul 25, 2025	Jul 23, 2025
Ubuntu	—	Upgrade libhtp-devUpgrade libhtp-dev (Ubuntu Pro)Upgrade libhtp2Upgrade libhtp2 (Ubuntu Pro)Upgrade libhtp1 (Ubuntu Pro)	Oct 10, 2025	Jul 23, 2025

Prioritize with Active Threat Intelligence

With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.

Explore Intelligence Hub

MDR Buyer's Guide

Global Threat Landscape Report

Grow your business

CVSS Details

Covered by Rapid7

Prioritize with Active Threat Intelligence